Fabric Mods for Minecraft 1.21
Browse 163 free Fabric mods for Minecraft 1.21 — popular picks include ForgeEndertech, Almost Unified, Cardinal Components API.
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ForgeEndertech
Core library powering Endertech mods
Almost Unified
Unify all resources.
Cardinal Components API
API for data-driven content
Create: Dragons Plus
Provide convenient features to players and dev utilities for Create addon developers.
Alloy Forgery
Forge some alloys
CC:C Bridge
Adds compatibility between CC: Tweaked and Create through more peripherals!
KubeJS Additions
[NEW] Custom JEI Categories & Jade Integration
AutoMessage
Now you can send automatic messages at any time during the game!
Track API
A compatibility layer for train mods
Photon
Photon - Making mc effects as Unity
Genshin Instruments
A mod that adds Genshin Impact's set of instruments into Minecraft!
Custom Machinery Create
Create support for Custom Machinery
BoxLib
A client-side library mod with tons of features to do all the heavy lifting for all client-side mod developers.
Factory API
An API that supports different mod loaders and is the basis of mods like Factocrafty
Jauml
Jauml is a lightweight configuration library for Minecraft mods, designed to simplify JSON-based config management
Quantified API
A high-performance API for Minecraft mods, built to handle tasks efficiently, reduce lag, use GPU acceleration, smart caching, and multithreading - keeping your game smooth and stable.
Potentials
Library to allow mod developers to use cross platform capabilities
Datapack Portals
Create custom portals using CustomPortalApi with datapacks
Craft Slabs Back into Blocks [Fabric/Forge/NeoForge]
A fully configurable mod that lets you craft slabs back into blocks
WunderLib
A Library Mod that simplifies Configs with an automated UI, Grid-Based UI-Layouts, Simplified Network management and other usefull utilities.
CobbleBoss
A mod that allows you to infinitely add and customize your own exclusive Bosses in the Cobblemon world.
Smelting Sand in a Blast Furnace [Fabric/Forge/NeoForge]
As the name says
Cooldown Coordinator
Library to help mods coordinate item movement cooldowns
PacketEvents
PacketEvents is a protocol library tailored to Minecraft Java Edition, designed to facilitate the processing and transmission of packets.
Jobs+
Adds 10 jobs to Minecraft. You can now add your own jobs!
Smelt All Stone Blocks in Blast Furnaces [Fabric/Forge/NeoForge]
Blast all types of stone including Netherrack or Quartz, fully configurable
Grim Anticheat
Fully async, multithreaded, predictive, open source, 3.01 reach, 1.005 timer, 0.01% speed, 99.99% antikb, "bypassable" 1.8-1.21 anticheat
Blasting Raw Metal Blocks [Fabric/Forge/NeoForge]
Blast whole raw metal blocks, fully configurable
WunderLib: New Dawn
An unofficially maintained continuation of WunderLib for Fabric and NeoForge, providing automated configuration screens, grid-based UI layouts, simplified networking, and other utilities used by BetterX mods
Better Crafting [Fabric/Forge/NeoForge]
This mod changes and adds few recipes
[FVTM] Fex's Vehicle and Transportation Mod
A vast addon-based mod allowing you to create Vehicles, Containers, Items, Blocks, Food/Drinks, Clothes and more!

TNT Timer
Adds a timer above tnt which displays the time until it explodes.
Create: Diamond & Factory
This Mod make Diamond from Factory

Sketch
A library for Team Abode's mods.
SDM Recipe Machine Stages
The ultimate progression tool for tech-based modpacks. Lock machine recipes behind stages with seamless KubeJS and CraftTweaker integration.
Travelers Lib
My library for adding animals and other helpful features